Throw dirt from stone

[Pitircinky]

Hello, I'm trying to create skript and I need help.

I want drop coins like this video in minecraft so coin item dirt.

Dirts must be dropped same lane and came from center of clicked stone block's side

Thanks

What did I do?

on rightclick on stone:
 loop 10 times:
  set {_b} to block event-direction
  drop 1 dirt named "&cUnstackable %random integer between 0 and 99999%" at {_b}
  wait 3 ticks

But its buggy. Dirts dropping from stone's corner and some dirts stucking. So dirts flying around